/**
 * @name jqTFQUrl
 * @date 2010-1-15
 * @copyright MyZ
 * @author MyZ
 * @link http://blog.csdn.net/mayongzhan/
 * @license MIT
 * Recommended for jquery 1.0.x
 * Example : 
 * $.encodeFlashget("http://blog.csdn.net/mayongzhan/", 86258)
 * $.decodeFlashget("Flashget://W0ZMQVNIR0VUXWh0dHA6Ly9ibG9nLmNzZG4ubmV0L21heW9uZ3poYW4vW0ZMQVNIR0VUXQ==&uid=86258")
 */

(function($){
	
	$.extend({
		
		encodeThunder : function(input) {
			return "thunder://" + Base64.encode("AA" + input + "ZZ");
		},

		decodeThunder : function(input) {
			var output = Base64.decode(input.substring(10));
			return output.substr(2, (output.length - 4));
		},

		encodeFlashget : function(input, uid) {
			//need the uid when you are the member of FlashgetUnion
			return "Flashget://" + Base64.encode("[FLASHGET]" + input + "[FLASHGET]") 
					+ (uid != undefined ? ("&uid=" + uid) : "");
		},

		decodeFlashget : function(input) {
			var uidIndex = input.indexOf("&");
			var output = Base64.decode(input.substring(11, uidIndex == -1 ? input.length : uidIndex));
			return output.substr(10, (output.length - 20));
		},

		encodeQQDL : function(input) {
			return "qqdl://" + Base64.encode(input);
		},

		decodeQQDL : function(input) {
			return Base64.decode(input.substring(7));
		}
	});
	
	/**
	*
	*  Base64 encode / decode
	*  http://www.webtoolkit.info/
	*
	**/
	
	var Base64 = {
	 
		// private property
		_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
	 
		// public method for encoding
		encode : function (input) {
			var output = "";
			var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
			var i = 0;
	 
			input = Base64._utf8_encode(input);
	 
			while (i < input.length) {
	 
				chr1 = input.charCodeAt(i++);
				chr2 = input.charCodeAt(i++);
				chr3 = input.charCodeAt(i++);
	 
				enc1 = chr1 >> 2;
				enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
				enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
				enc4 = chr3 & 63;
	 
				if (isNaN(chr2)) {
					enc3 = enc4 = 64;
				} else if (isNaN(chr3)) {
					enc4 = 64;
				}
	 
				output = output +
				this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
				this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
	 
			}
	 
			return output;
		},
	 
		// public method for decoding
		decode : function (input) {
			var output = "";
			var chr1, chr2, chr3;
			var enc1, enc2, enc3, enc4;
			var i = 0;
	 
			input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
	 
			while (i < input.length) {
	 
				enc1 = this._keyStr.indexOf(input.charAt(i++));
				enc2 = this._keyStr.indexOf(input.charAt(i++));
				enc3 = this._keyStr.indexOf(input.charAt(i++));
				enc4 = this._keyStr.indexOf(input.charAt(i++));
	 
				chr1 = (enc1 << 2) | (enc2 >> 4);
				chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
				chr3 = ((enc3 & 3) << 6) | enc4;
	 
				output = output + String.fromCharCode(chr1);
	 
				if (enc3 != 64) {
					output = output + String.fromCharCode(chr2);
				}
				if (enc4 != 64) {
					output = output + String.fromCharCode(chr3);
				}
	 
			}
	 
			output = Base64._utf8_decode(output);
	 
			return output;
	 
		},
	 
		// private method for UTF-8 encoding
		_utf8_encode : function (string) {
			string = string.replace(/\r\n/g,"\n");
			var utftext = "";
	 
			for (var n = 0; n < string.length; n++) {
	 
				var c = string.charCodeAt(n);
	 
				if (c < 128) {
					utftext += String.fromCharCode(c);
				}
				else if((c > 127) && (c < 2048)) {
					utftext += String.fromCharCode((c >> 6) | 192);
					utftext += String.fromCharCode((c & 63) | 128);
				}
				else {
					utftext += String.fromCharCode((c >> 12) | 224);
					utftext += String.fromCharCode(((c >> 6) & 63) | 128);
					utftext += String.fromCharCode((c & 63) | 128);
				}
	 
			}
	 
			return utftext;
		},
	 
		// private method for UTF-8 decoding
		_utf8_decode : function (utftext) {
			var string = "";
			var i = 0;
			var c = c1 = c2 = 0;
	 
			while ( i < utftext.length ) {
	 
				c = utftext.charCodeAt(i);
	 
				if (c < 128) {
					string += String.fromCharCode(c);
					i++;
				}
				else if((c > 191) && (c < 224)) {
					c2 = utftext.charCodeAt(i+1);
					string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
					i += 2;
				}
				else {
					c2 = utftext.charCodeAt(i+1);
					c3 = utftext.charCodeAt(i+2);
					string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
					i += 3;
				}
	 
			}
	 
			return string;
		}
	 
	};
})(jQuery);